Authorities have since arrested a 37-year-old man on suspicion of first-degree arson for allegedly starting the Old Trails Fire. A homeowner in Spokane watched their home burn down over the weekend as wildfires tore through the area. What they're saying:"That’s our house right there, it’s about to go down in flames," the homeowner can be heard telling Smith in the Storyful video. The backstory:As of Tuesday morning, the trio of fires — the Old Trails Fire, Autumn Lane Fire and Fairview Fire — hadn’t been contained at all. A 37-year-old man was arrested Monday on suspicion of first-degree arson for allegedly starting the Old Trails Fire.